Username Checkers:

https://namechk.com/

http://knowem.com/

https://www.namecheckr.com/

https://usersearch.org/

https://thatsthem.com/

http://checkusernames.com/

https://namecheckup.com/

https://instantusername.com/

Email Searchers:

https://thatsthem.com/reverse-email-lookup

http://www.melissadata.com/lookups/emails.asp

https://pipl.com/

https://epieos.com/

http://www.reversegenie.com/email.php

Email Data Leaks:

https://haveibeenpwned.com/

https://www.vigilante.pw/

https://dehashed.com/

IP Loggers:

https://ki.tc/

https://grabify.link/

https://iplogger.com/

IP Geolocation:

https://www.iplocation.net/

https://www.infobyip.com/

http://www.infosniper.net/

People Searcher:

http://www.familytreenow.com/

http://www.ussearch.com/

https://nuwber.com/

https://www.truepeoplesearch.com/

Court Records:

http://www.blackbookonline.info/USA-County-Court-Records.aspx

https://www.crimereports.com/

Geolocation Tools:

http://suncalc.net/

http://www.gpsvisualizer.com/geocode

https://dominoc925-pages.appspot.com/mapplets/cs_mgrs.html

https://www.doogal.co.uk/BatchGeocoding.php

Archives:

https://web-beta.archive.org/#/

https://archive.org/web/

https://databases.today/

Anonymous Persona Creation:

http://www.fakenamegenerator.com/

http://justdelete.me/fake-identity-generator/

https://randomuser.me/

https://www.pexels.com/

https://cdn.rawgit.com/Marak/faker.js/master/examples/browser/index.html